A ship detector applying Principal Component Analysis to the polarimetric Notch Filter



Zhang T, Marino A, Xiong H & Yu W (2018) A ship detector applying Principal Component Analysis to the polarimetric Notch Filter. Remote Sensing, 10 (6), Art. No.: 948.

Ship detection using polarimetric synthetic aperture radar (PolSAR) data has attracted a lot of attention in recent years. Polarimetry can provide information regarding the scattering mechanisms of targets, which helps discriminate between ships and sea clutter. This enhancement is particularly valuable when we aim at detecting smaller vessels in rough sea states. This work exploits a ship detector called the Geometrical Perturbation-Polarimetric Notch Filter (GP-PNF), and it is aimed at improving its performance especially when less polarimetric images are available (e.g., dual-polarimetric data). The idea is to design a new polarimetric feature vector containing more features that are renowned to allow separation between ships and sea clutter. Then, a Principal Component Analysis (PCA) is further used to reduce the dimensionality of the new feature space. Experiments on four real Sentinel-1 datasets are carried out to demonstrate the validity of the proposed method and compare it against other ship detectors. Analyses of the experimental results show that the proposed algorithm can not only reduce the false alarms significantly, but also enhance the target-to-clutter ratio (TCR) so that it can more effectively detect weaker ships.

ship detection; polarimetric features; GP-PNF; PCA; Sentinel-1; false alarms; weaker ships

Remote Sensing: Volume 10, Issue 6

FundersNational Natural Science Foundation of China
Publication date30/06/2018
Publication date online14/06/2018
Date accepted by journal11/06/2018

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Dr Armando Marino
Dr Armando Marino

Senior Lecturer in Earth Observation, Biological and Environmental Sciences